Hoisting apparatus



(No Model.) 2 SheetsSheet 1 G. W. R'AWSON.

HOISTING APPARATUS.

No. 436,190. Patented Sept. 9, 1890.

in: News arms 00.. vnurmmm, wAsnmumn, n. a:v

(No Model.) 2 Shets-Sheet 2. G. W. RAWSON.

HOISTING APPARATUS.

Patented Se 12.9, 1890.

ms scams r-E'rzns cm, FHGTOLITNOM wasmusmu u UNITED STATES PATENTOFFICE.

GEORGE WV. RAWSON, OF CAMBRIDGE, MASSACHUSETTS.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 436,190, datedSeptember 9, 1890.

7 Application filed May 29, 1890- Serial No. 353,661. (No model.)

porting a shaft H, provided at each end with To all whom it may concern:

Be it known that I, GEORGE W. RAwsoN, a

Q citizen of the United States, residing at Camclear, and exactdescription of the invention,

such as will enable others skilled in the art to which it appertains tomake and use the same,

" reference beinghad to the accompanying draw- .braced near their innerends, said rods supings, and to the letters and figures of referencemarked thereon, which form a part of this specification.

Figure 1 is a side elevation, Fig. 2 a top view, and Fig. 3 a frontelevation, of a hoisting apparatus provided with my invention.

Fig. 4 is a side view, on an enlarged scale, of a portion of the rail ortrack F with the stop and truck applied thereto,-the bucket also beingshown in side view. Fig. 5is asection of the truck and rail on line 1 1of Fig. 4. Fig. 6 is a horizontal section on line 2 2 of said Fig. 4.Fig. 7 is a side view, Fig. 8 an end View, and Fig. 9 a top view, of thelower end portion of the rail F with the stopWapplied to it. Fig. 10 isa longitudinal section of the said stop. Figs. 11 and 12 are verticalsections in planes at right angles to each other of the headed andflanged thimble arranged on the eyebolt which connects the hoistingcableto the head block of the hoistingbucket.

The nature of my invention is defined in the claims hereinafterpresented.

The drawings represent at A a portion of a wharf having a framework Berected thereupon, which may be of any desired length, and at top isprovided with a trackway G, on which is mounted awheeled structureD,which contains the hoisting-engine E, and from the upper part of whichis projected an inclined rail or track F, jointed or hinged at a, whichadmits of the outer portion of said track being lowered or folded downinto the position shown in dotted lines in Fig. 1.'

A cross-head b is fixed to the outer end of the track F, and to the endsof said crosshead rods or bars G G are pivoted, the latter beingproperly connected to each other and a flanged wheel 0, the faces ofwhich bear against and when in movement roll on the outer face ofupright rails or guides I, fixed to the structure D and extended downinfront of the frame-work, as represented in Figs. 1 and 3. Bars K, bentas shown, are fixed to the outer face of the rails I to keep the wheels0 from falling away from said rails when the track is lowered or foldedinto the position shown in dotted lines in Fig. 1, and the wheels 0,when the said track is in the position shown in full lines in Fig. 1,are arranged to stand higher than the pivots b, and are kept from risingby a tackle L, attached to the framework and to the shaftH, the saidtrack being thrown forward or outward by drawing the wheels 0 and theirshaft from their higher position (shown in dotted lines in Fig. 1)downward by means of said tackle against the rails I and into theposition shown in full lines in the said figure.

Guys G G, which are secured to the crosshead, (see Fig. 2,) cross eachother and are secured at their other ends to and near the tops of theuprights I, and serve when the track F is forced to its outward positionto brace the same to excellent advantage. The track F has the form of aninverted T in cross-section, and on the said track is arranged a truckM. (Shown in Figs. 1 and 2, and also in Figs. 4 and 5 on an enlargedscale.)

The truck M consists of plates or sides e e, arranged one on each sideof the rail or track F and connected to each other at the bottom andunderneath said rail by the bars ff and also by the rod g, which servesas a journal for the sheaves N 0, over which and sheaves each other.(See dotted lines in Fig 6.) The levers T areeach provided with asemicircutoo lar opening 7r, which, when the jawsare together, form acircular opening through which the hoisting-cable Q passes when raisingor lowering the bucket between the truck and the vessel. The saidopenings in the levers T T encircle the neekZ of a headed and flangedthimble V, which with said levers forms a lock to connect the bucket tothe truck while the latter is moving up and down the track F, to behereinafter explained. The said thimble V, provided with a head '1; anda flange w, connected by a neck Z, encircles a double eyebolt 00,connected at its top to the hoisting-cable Q and at its ,bottom to ashackle y, coupled to an eye 2 in the head-block B of thehoistingbucket. (See Figs. 4, 5, l1, and 12.)

Arranged on the rail or track F is a stop WV for the truck, said stopadapted to be moved thereon to determine the position of thebueket withrelation to the hatchway of the vessel.

The stop XV consists of two inclined rails m an, arranged on oppositesides of the track F and bearing on the upper surface of the arms (1 (Zof the said track, said rails being recessed at n and provided with anabutment at 0, against which the lower of the wheels g of the truck restwhen the latter is in engagement with the stop. The rails m m areconnected together by a double angle-ironj, riveted to their outersides, the lower part of said iron passing underneath the rail F, (seeFigs. 7 and 8,) and to the bottom surface of said iron a double-inclinedcam X is fixed, which operates to spread the jaws of the levers T T whenin contact therewith (see Fig. 6) to disengage them from the thimble V.

To one side of the stop W is fixed a bracket 13, which supports a rod q,adapted to slide therein, and to said rod a rubber or other spring a" isapplied A cable 8 is attached to the other end of said rod q and is ledto and around a drum J, fixed to a shaft Y, supported in the upper partof the structure D. A pulley Z is also fixed to the said shaft Y, abandor hand rope 25 passing about said pulley, and a smaller one A arrangedbelow the floor of the structure. (See Fig. 1.) On revolving the saiddrum X by moving the hand-rope t the position of the stop lV on the railor track may be determined as desired, and the said stop, being held bythe cable 3, provided with the spring 0', can yield when the truckbrings up against the abutinents o and break the force of the blow.

The usual system of pedals and levers for operating the apparatus isindicated at C in Fig. 2.

The rail or track F and the supports I I are in many cases applied by meto a fixed tower, shed, or frame-work, instead of to a wheeledstructure, as represented.

I The operation of the apparatus may be thus explained: )Ve will nowsuppose the bucket to be loaded and as being drawn upward. (See Fig. 4.)The longer arms of the levers T T be ing spread apart by the cam X, (seeFi 6,)

.the head 1) of the thimble V will pass between said levers; but theflange w of said thiinble, being of too large diameter to pass betweenthem, will bring up against their under side and will lift the truck andcarry the lower wheels g out of the sockets n n of the stop W and willroll the truck up the track F. As soon as the levers T T are out ofcontact with the cam X they will be forced together and will grasp theneck Z of the thimble V, and thereby lock the bucket to the truck. Whenthe truck has ascended high enough to carry the bucket over eitherhopper-two being shown at 1 and 2 (see Fig. l)--by unclutching the drumof the cable R, which operates the jaws of the bucket, said jaws willimmediately open and discharge the contents of the bucket into thehopper. Next the drum of the bucket-hoisting cable Q is unclutched, andthe truck M, with the bucket locked to it, rolls down the track untilsaid truck is checked by the stop W. The levers T T being at the sametime spread apart by the cam X, and the thimble V also unlocked from thetruck, the bucket will continue its descent without interruption intothe hold of the vessel.

From the foregoing it will be seen that by my improvements there will beno waste of time in operating the bucket, the, movement of the bucketfrom the time it leaves the hold of the vessel till it reaches thehopper being continuous, and the same is the case from the time itleaves the hopper till it reaches the hold of the vessel, and the bucketbeing auto matically locked to and unlocked from the truck, asexplained, and the truck being so applied to the rail that it cannot getoff the track, renders the apparatus particularly safe and rapid for thepurpose for which it is designed.

)Vhat I claim is"-- 1. In a hoisting apparatus, the rail or track F,jointed and provided with a cross-head, in combination with the bars GG, pivoted to said cross-head and provided with wheels, the structure D,supporting the rail or track and provided with the uprights I and barsK, fixed thereto to guide said wheels in their vertical movements, andthe operative tackle L, as and for the purpose explained.

2. In a hoisting apparatus, the truck M, consisting of the sides 6 e,inclined at top and provided with the supporting-wheels g, the bars ff,connecting said sides at the bottom, the sheaves N 0, arranged side byside on a single journal connecting said sides, the levers T T,supported underneath said sheaves and adapted to be moved apart, theaxis of the openings 7a in said levers when closed being in the samevertical plane as the middle of the groove in one of said sheaves, andthe spring U, in combination with the thimble V, adapted to operate withsaid levers, as and for the purpose explained.

3. In a hoisting apparatus, the stop W, consisting of the inclined railsprovided with sockets, and abutment-s arranged on opposite sides of therail or track and connected to each other and provided with the doublecam, in combination with the rail or track and mechanism for locatingthe stop thereon, said mechanism consisting of the cable 3, connected tothe stop, the drum J, its supporting-shaftand operative pulley, and theoperative line or rope 25, substantially as set forth.

4. A hoisting apparatus comprising the structure D, the rail or track F,jointed and provided with the cross-head and supported by saidstructure, the sheaves or drum P, the uprights I and bars K, fixed tosaid uprights, the bars G G, pivoted to the cross-head and provided withwheels, the rail or track operative tackle, the truck M and the stop W,each adapted to the rail or track and to each other, essentially asrepresented, the levers fulcrumed to the truck, the cam fixed to the 20stop, and the hoisting-cable provided with the in combination with theeyebolt and shackle,

as explained.

In testimony whereof I affix my signature in presence of two witnesses.

GEORGE W. RAWSON. Witnesses:

S. N. PIPER, O. F. DANIELS.

